2. 外语
  3. Not until three years ago______ to work overseas.

Not until three years ago______ to work overseas.

admin2016-01-26  26
问题 Not until three years ago______ to work overseas.
选项 A、he began
B、he begins
C、began he
D、did he begin
答案D
解析 not until置于句首时，主句要求使用部分倒装语序，即将助动词提至主语之前。句子描述的是过去时态，故用did。
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